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OTIS 
SKIP HOISTS 
AUTOMATIC 
OPERATION 





OTIS ELEVATOR 
COMPANY 


OFFICES IN ALL PRINCIPAL 
CITIES OF THE WORLD 











OTIS 


SKIP HOISTS 
AUTOMATIC OPERATION 


For the Speedy and Efficient Handling of 
Coal, Ashes and Similar Materials 
in Gas Plants, Central Sta- 
tions, Mining Plants, 
Factories, Etc. 





The Otis automatic push button controlled 
Skip Hoist as illustrated and described on the fol- 
lowing pages is intended to meet a growing demand 
for high grade reliable apparatus for raising various 
materials in bulk, such as coal, ashes, etc., and 
automatically delivering them at a higher level. 


One of the chief causes contributing to the 
demand for automatic apparatus of this nature 
is the increasing scarcity of manual labor, which 
results in a demand for equipment that will 
reliably perform the work previously done by 
manual methods. A prime requisite of automatic 
apparatus for hoisting materials is reliability, and 
this has always been the first consideration in 
the design and selection of the apparatus and 


material used in building Otis Automatic Skip 
Hoists. 


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Particularly must the hoisting machine and 
controlling apparatus be of the most rugged and 
correct design, as any failure to properly perform 
their functions would result, in most cases, in 
costly delays, and thus defeat the purpose for 
which the apparatus was installed. 





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Typical Layout of Otis Automatic Push Button Skip Hoist 
with Machine Located at Top of Hoistway. 
Arranged for Vertical Hoisting. 


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To meet these exacting requirements the Otis 
Elevator Company takes advantage of its line 
of hoisting machines which have been developed 
and refined for regular elevator service, and the 
customer therefore obtains all the advantages of 
owning and operating thoroughly standardized 
and well tried apparatus. The usual skip hoist 
control system also is nearly identical with that 
used on certain classes of regular freight and 
passenger elevator installations. 


Next in importance to the question of relia- 
bility and proper design in the minds of the 
operating force of any plant is the consideration 
of the facility and quickness with which they can 
secure spare parts. Since we use standard ele- 
vator apparatus on skip hoist installations and 
due to the fact that Otis Service offices are 
located in all the important cities and towns of 
the United States, as well as in the principal cities 
in other parts of the world, it is always possible to 
secure promptly any renewal parts which may be 
required, as spare parts for standard elevator 
machines and controllers are kept in stock at all 
of our Service offices. 

Otis Skip Hoists may be divided into two 
classes according to whether the bucket for carry- 
ing the load travels vertically or on an incline. 
Both vertical and incline hoists may be equipped 
with a single hoisting bucket, which may or may 
not require a counterweight, or with two hoisting 
buckets running on separate tracks, the one acting 
as the counterweight for the other. 

For the duties generally found in handling 
coal, ashes, etc., in Manufacturing Plants and 





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Central Power Stations, it is, as previously 
explained, our practice to use standard elevator 
hoisting machines. These can be located either 
overhead or at ground level, adjacent to the hoist- 
way. [he usual machine consists of a single or 
double drum (according to whether a single or 
double skip arrangement is used), a worm gear 
reduction, an electrically-released, spring-applied 
shoe brake, and a motor, all of these parts being 
mounted on a heavy cast iron base plate to pre- 
serve alignment. The illustration below clearly 
shows the arrangement. -Where an extra heavy 
load is to be handled at slow speed an additional 
speed reduction is frequently employed, consisting 
of a pinion engaging with an internal cut gear 
mounted on the hosting drum. This arrangement 
is shown in the illustration on page 7. 


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Otis Direct Current Internal Geared Hoisting 
Machine and Controller. 


The control system generally furnished is an 
important feature of Otis Skip Hoist apparatus, as 
its action is entirely automatic. The operation is 
by means of three push buttons marked “Up”, 
~Down™ and ‘Stop’. These are mounted in a box, 
as illustrated on page 8, and can be located 
wherever most convenient. When the bucket has 
received its load the attendant presses the “Up” 
button which causes the machine to start, and from 
this point the operation is entirely automatic. The 
machine accelerates to full speed, the bucket rises 
to the upper level, and at the proper point the 
machine slows down and the bucket travels into 
the dumping position, where on single skips it stops 
and automatically remains for a pre-determined 
interval which is sufficient to allow the material to 
be entirely discharged from the bucket. The 
machine then automatically starts in the down” 


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direction and continues in operation until the buck- 
et reaches the lower level and automatically stops 
in the loading position. A pressure of the “Stop” 
button at any time during the travel of the bucket 
will cause the machine to come to rest. If the 
“Up” button is then pressed, the bucket will con- 
tinue in its normal cycle as above described, and 
if the “Down” button is pressed, the bucket will 
return to the loading position at the bottom. 


In the case of a double skip hoist, when the 
ascending bucket reaches the dumping position 
the machine remains stationary until it is again 
started by the operator at the loading point, he 
having in the meantime attended to the loading 
of the other bucket. 


The advantages of an automatic control sys- 
tem such as above described are very great. The 
attendant is enabled to go ahead with other work 
as soon as he has pressed the button which starts 


the hoist. |The push button control is entirely 


independent of the class of labor used, since the 
stopping and dumping are not sgsiaeeai upon 
manipulation of the oper- Z 
ating button, hand rope or 
switch, as is the case with 
non-automatic control sys- 
tems. 


It is possible to elimi- 
nate an operator entirely 
by arranging the bucket 
so that it is loaded auto- 
matically, and when a Push Button Box showing 


; Up, Down, and Stop 
predetermined load has Control Buttons 





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Otis Alternating Current Controller as used with Otis 
Automatic Push Button Skip Hoists. 








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been received a contact is made which is equiva- 
lent to the pressure of the “Up” button by an NA 
operator. The machine then starts, and the | 
bucket ascends, automatically closing the gate on : 
the loading chute in passing, and continues upward ‘s 
to the dumping position, then dumps, descends, : 
opens the loading gate in passing, stops, and re- NI 
loads, this continuous automatic operation ceasing 
only when the supply of material is not sufficient t 
to fill the bucket. | Push Button Control may be ‘- 
furnished as an auxiliary method of operation. Yj 
This system can be used with either single or M 


double skips. 


The bucket usually furnished for vertical skip : 
hoists, either of the single or double skip type, is +e 
made of heavy steel plates reinforced with structural NJ 
shapes, and provided with two cams symmetrically ( 
located on each side of the bucket. These cams vy 
are made of channels or angles properly shaped, : 
and riveted to the bucket. The bucket is sup- - 
ported in a steel frame or sling by means of two ; 
trunnions, and is held in an upright position and A 
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brackets bearing against angle iron guides. These ; 

guides, which are fastened to the sides of the vk 

hoistway, control the travel of the bucket. As : 

Hey, | the bucket approaches the upper limit of the 
travel the cams engage with a pair of rollers 71 
4 mounted securely at the sides of the hoistway. i 
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Wt bucket to swing from the vertical position until 
RA it reaches an angle at which the material contained V7 
nw) in the bucket can freely slide into the chute, m1 
14) hopper or other receptacle provided for this pur- } 
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Section of Tower Showing Bucket, Cams, Trunnions, 
Brackets, Guides, etc. 


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pose. At the position where the bucket starts to 
swing, the angle iron guides are cut so that the 
brackets can pass through the guides and permit 
the bucket to swing. The usual arrangement of 
bucket, cams, rollers, etc., is shown in the illus- 
tration on page II. 

Where the material is to be hoisted on an 
incline, the bucket is equipped with four flanged 
wheels as illustrated in the diagram on page 14. 
These wheels usually run on standard light weight 
railway tracks and by the use of double treads 
on one pair of wheels and additional tracks at 
the dumping point, the bucket is dumped without 
the use of the cams and rollers which are necessary 
on the vertical type of hoist. 

The hoistway for the travel of the bucket 
may be a steel tower, a concrete hatch or well-way 
or any other desired form of construction. 


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of whether a counterweight is required is one 
depending entirely upon the load and_ speed 
conditions. For light loads and slow speeds it is 
usually unnecessary to install a counterweight. 


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SOME TYPICAL 
INSTALLATIONS 
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OTIS 
SKIP 
HOISTS 


IN 
MANUFACTURING PLANTS, 
COAL AND COKE PLANTS, 
GAS, ELECTRIC LIGHT 
AND 
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Otis Automatic Skip Hoist handling hot calcium 
carbide in a Manufacturing Plant. 


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Otis Skip Hoist in Manufacturing Plant, 
Showing Bucket near Dumping Position. 


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Otis Skip Hoist in Manufacturing Plant. Close 
View of Bucket near Dumping Position. 


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Otis Inclined Automatic Skip Hoist Handling Ashes 





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Otis Skip Hoist Handling Ashes in a Coal and 
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Otis Skip Hoist Handling Coal. 

















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Otis Skip Hoist Handling Coal. 





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OTIS 
SKIP HOISTS 


For Blast Furnace Skips, Inclined 


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Railways and Similar 
Installations. 


This booklet would be incomplete without 
the mention of another class of hoisting machines 
which we manufacture for heavier duties than 
can be taken care of by standard elevator machines. 
These are the Herringbone Gear, Single and Dou- 
ble Drum Hoists used for Blast Furnace Skips, large 
Inclined Railways and similar installations where 
heavy duty hoists with automatic control are 
required. 


A typical direct current machine is shown on 
Page 29 and one of the alternating current type on 
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Otis Double Drum Skip Hoist driven by an Otis Direct Current Interpole Variable Speed Motor of 250 H.P. 
Equipped with two External Herringbone Gear Reductions Fully Enclosed and Running in Oil Baths. 

















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Otis Double Drum Skip Hoist driven by an Otis Alternating Current Two Speed Motor of 250 H.P. '} 5 
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UNITED STATES 


Akron, Ohio, 98 Ash Street 
Albany, N. Y., 40 Beaver Street 
Allentown, Pa., 194 Ellsworth Street 
Altoona, Pa., 1019 Sixteenth Avenue 
Atlanta, Ga., Kontz Bldg. 
Atlantic City, N. J., 14 North Presbyter- 
ian Avenue 
Augusta, Ga., 846 Ellis Street 
Baltimore, Md., Room 318, Peoples Bank 
Building 
Birmingham, Ala., 1918 Morris Ave. 
Boston, Mass., 34-35 India Street 
Brooklyn, N. Y., 49 Willoughby Street 
Buffalo, N. Y., Franklin & Huron Sts. 
Cedar Rapids, Ta., 820 S. 19th Street 
Charleston, S. C., 155 Meeting Street 
Charleston, W. Va., 19 Hale Street 
Chattanooga, Tenn., 819 Cherry Street 
Chicago, Ill., 600 W. Jackson Blvd. 
Cincinnati, Ohio, 305 East Fourth St. 
Cleveland, O., 526-32 Leader-News Bldg. 
Columbia, S. C., 1124 Hampton Ave. 
Columbus, Ohio, 230 North Third St. 
Dallas, Texas, 417 S. Akard Street 
Davenport, Iowa, 218 East Third St. 
Dayton, Ohio, 509 East Third Street 
Denver, Col., 1626-28 Glenarm Street 
.~Des Moines, Iowa, 409 West Fifth St. 
Detroit, Mich., West Fort & Fifth Sts. 
Duluth, Minn., 329 W. Michigan Street 
El Paso, Tex., 304 Caples Building 
Erie, Pa., 1509 Sassafras Street 
Fort Wayne, Ind., 6 North American Bldg. 
Fort Worth, Tex., 215 Dan Waggoner Bldg. 
Fresno, Cal., 620 Griffith-MeKenzie Bldg. 
Grand Rapids, Mich., 7 Oakes Street 
Harrisburg, Pa., 28 South Third Street 
Harrison, N. J., Ist St. & Railroad Ave. 
Hartford, Conn., 76 Market Street 
Hot Springs, Ark., 773 Park Avenue 
Houston, Texas, 3118 German Street 
Indianapolis, Ind., 22 S. Capitol Avenue 
Jacksonville, Fla., 210 E. Forsyth Street 
Kalamazoo, Mich., 216 E. Water Street 
Kansas City, Mo., 1918-20 Wyandotte St. 
Knoxville, Tenn., 325 Walnut Street 
Lincoln, Neb., 1016 K Street 
Little Rock, Ark., 401 Center Street 
Los Angeles, Cal., 300 E. Eighth Street 
Louisville, Ky., 206 West Main Street 
Lynchburg, Va., 109 Eighth Street 
Macon, Ga., 367 Second Street 
Memphis, Tenn., 292 Monroe Avenue 
Milwaukee, Wis., 115-117 Huron Street 
Minneapolis, Minn., 412 6th Ave——South 





Mobile, Ala., 256 St. Michael Street 
Montgomery, Ala., 317 Moulton Street 
Nashville, Tenn., 148 Sixth Ave.—North 
New Haven, Conn., 124 Meadow Street 
New Orleans, La., 852 Carondelet Street 
New York, N. Y., 11th Ave. & 26th Street 
Norfolk, Va., 531 Cove Street 
Oakland, Cal., 333 Thirteenth Street 
Oklahoma City, Okla., 222 W. Second St. 
Omaha, Neb., 1200 Jackson Street 
Peoria, Ill., 540 S. Adams Street 
Philadelphia, Pa., 16th & Sansom Streets 
Pittsburgh, Pa.. Chamber of Commerce 
Building 
Portland, Me., 495 Fore Street 
Portland, Ore., 482 Burnside Street 
Providence, R. I., 218-222 S. Main Street 
Reading, Pa., 511 Penn Street 
Richmond, Va., 12 South Tenth Street 
Roanoke, Va., Terry Building 
Rochester, N. Y., 8 & 10 Jones Street 
Rockford, Ill., 705 North Horsman Street 
Sacramento, Cal., Forum Bldg. 
Saginaw, Mich., 1245 So. Washington St. 
St. Joseph, Mo., 209 S. 7th St. 
St. Louis, Mo., Locust & 23rd Sts. 
St. Paul, Minn., Endicott Bldg. 
Salt Lake City, Utah, 606-9 Judge Bldg. 
San Antonio, Tex., 610 Market Street 
San Diego, Cal., 212 Timken Bldg. 
San Francisco, Cal., 2300 Stockton St. 
Savannah, Ga., 18 State Street-—West 
Scranton, Pa., 208 Franklin Avenue 
Seattle, Wash., 1202-4 Fourth Avenue 
Shreveport, La., 501 Continental Bank 
Building 
Sioux City, Iowa, 224 Iowa Bldg. 
Spokane, Wash., 228 S. Washington St. 
Springfield, Mass., 224 Worthington St. 
Springfield, Mo., 219 N. Campbell St. 
Stockton, Cal., 302 Yosemite Bldg. 
Syracuse, N. Y., 374 West Fayette St. 
Tacoma. Wash., 1721 Jefferson Street 
Tampa, Fla., 210 Cass Street ; 
Toledo, Ohio, 241 Michigan Street 
Trenton, N. J., 137 East State St. 
Tulsa, Okla., 201 Unity Bldg. 
Utica, N. Y., 10 Catharine Street 
Washington, D. C., 303-8 Metropolitan 
Bank Building 
Wheeling, W. Va., Schmulbach Bldg. 
Wichita, Kan., 118 East Second Street 
Wilmington, Del., 10th & Market Streets 
Worcester, Mass., 311 Main Street 
Youngstown, Ohio, 120 E. Boardman St. 





FOREIGN 


ARGENTINE 
Otis Elevator Company 
Buenos Aires, Calle Suipacha, 624 
Rosario de Santa Fé, Gral Mitre 735 


AUSTRIA-HUNGARY 
Otis Aufzugswerke Gesellschaft, mit 
beschrankter Haftung 
Vienna, IX, 6 Wihringerstrasse 
Budapest, V, 3 Vecseyutca 





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BELGIUM 


Compagnie Belge des Ascenseurs Otis 
Brussels, Chaussée d’Anvers 102 
Antwerp, 16 Rue Gerard | 

Ostend, Rue Francois Musin 41 


BRAZIL 


Middletown Car Company 

Rio de Janeiro, 107 Avenida Rio Branco 
Ernesto De Castro & Co. 

Sao Paulo, Rua Boa Vista 26 


CANADA 


Otis-Fensom Elevator Company, Ltd. 

Main Office: 50 Bay St., Toronto, Ont. 

Calgary, Alberta, Tees & Persse Bldgs., 
322-5 Ninth Ave. W. 

Edmonton, Alberta, 10187 104th Street 

Halifax, Nova Scotia, 215 Lower Water St. 

Montreal, P. Q., 368 St. James Street 

Ottawa, Ont., 254 Queen Street 

Quebec, P. Q., Dominion Bldg., 126 St. 
Peter Street 

Regina, Saskatchawan, Cor. Eleventh Ave. 
& Lorne Street 

Vancouver, B. C., 1152 Mainland Ave. 

Victoria, B. C., 635 Dominion Road 

Winnipeg, Manitoba, 316 Cumberland 
Avenue 


CHILE 


Spencer & Waters 
Santiago, Calle Huérfanos No. 946 
Valparaiso 


CHINA 

G. S. Jensen 

Shanghai, 13 Nanking Road 
CUBA 


Zaldo & Martinez 
Havana, 26-28 Calle O'Reilly 


DENMARK 


Otis Elevator Company 
Copenhagen, Puggaardsgade No. 2 


FRANCE 


Ateliers Otis-Pifre 
Paris, 174 Rue de Courcelles 
Nice, 9 Rue Gounod 
Lyon, 28 bis rue Doumoulin 
Marseille, 22 Pl. Thiars 
Bordeaux, 9 cours de Gourges 


GERMANY 
Otis Aufzugswerke Gesellschaft, 
mit beschrankter Haftung 
Main Office & Factory: Wittenau, 
Berlin Mirau-Ecke Innungstrasse 
Cologne, Deichmannshaus 
Hamburg, 27 Schwanenwik 


HAWAIIAN ISLANDS 
Von Hamm- Young Co. Ltd. 
Honolulu 
HOLLAND 


Fred Stieltjes & Co. 
Amsterdam, 745 Keizersgracht 


JAPAN 


American Trading Company 
Tokio, No. 1 Itchome, Yuraku-Cho 
Kobe, No. 99 Kitamachi 


MEXICO 
Otis Elevator Company 
Mexico City, Plaza Santos Degollado 
Num 8 
PHILIPPINE ISLANDS 
Frank L. Strong Machinery Co. 
Manila, 64-68 Calle Echague 
PORTO RICO 
J. H. Cerecedo 
San Juan, S. Brau. 85 


RUSSIA 
Otis Elevator Company 
Petrograd, 21 Nievsky Prospekt 
Moscow, Miasnitskaja 24 


Chr. Brun & Son 
Warsaw, Hotel Bristol 


SPAIN 


Ateliers Otis-Pifre 
Madrid, 32 Ronda de Atocha 


SWITZERLAND 


Otis Aufzugswerke 
Zurich 
Factory: Waedenswil 


URUGUAY 


Otis Elevator Company 
Montevideo, San Jose 867 


ASSOCIATED COMPANY FOR THE BRITISH EMPIRE 


UNITED KINGDOM 


Waygood-Otis, Limited 

Head Office & Works: London, S. E., 
Falmouth Road 

Brighton, 1 Grafton Mansions, Grafton 
Street, Kingscliffe 

Birmingham, 63 Lionel St. 

Cardiff, 6-7 St. Johns Sq. 

Glasgow, 116 Hope St. 

Leeds, Standard Buildings 

Liverpool, Royal Liver Bldgs., Pier Head 

Manchester, 90 Princess St. 

Margate, 1 Carn Brea, Bath Road, 
Cliftonville 

Newcastle, Pilgrim St., Pilgrim House 

Plymouth, 41 George Street 

Belfast, 1-11 Fountain St. 

Dublin, 5 Leinster St. 


AUSTRALASIA 


Standard-Waygood Hercules Ltd. 
Sydney, Australia, 77 King St. 
Adelaide, S. Australia 





Auckland, New Zealand 
Brisbane, Queensland 
Christchurch, New Zealand 
Dunedin, New Zealand 
Hobart, Tasmania 
Melbourne, Victoria 

Perth, W. Australia 
Wellington, New Zealand 


SOUTH AFRICA 
Waygood-Otis (South Africa) Ltd. 
Johannesburg, 109 Main St. 

Durban, East London, Port Elizabeth, 
Cape Town, R. M. Ross & Co., Strand St. 


INDIA AND THE FAR EAST 


Bombay, Turner Hoare & Co., Elphin- 
stone Circle 

Colombo, Walker Sons & Co. Ltd. 

Calcutta, Balmer Lawrie & Co., 103 
Clive Street 

Hong Kong, Dodwell & Co, Ltd. 

Rangoon, Bulloch Bros. & Co. Ltd. 

Singapore, Central Engine Works, Ltd. 








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